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Issue 43, 2017
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An amorphous Co-carbonate-hydroxide nanowire array for efficient and durable oxygen evolution reaction in carbonate electrolytes

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Abstract

The development of earth-abundant catalysts toward high-efficient and durable oxygen evolution reaction (OER) electrocatalysis in the carbonate electrolyte is in great demand but remains a huge challenge. In this communication, we describe the development of a Co-carbonate-hydroxide nanowire array on nickel foam (CoCH/NF) via in situ electrochemical conversion of the Co(CO3)0.5(OH)·0.11H2O nanowire array. When utilized as a 3D catalyst electrode for the OER in 1.0 M KHCO3 (pH: 8.3), as-formed CoCH/NF demands overpotential of only 332 mV to drive a geometrical catalytic current density of 10 mA cm−2, with its catalytic activity being maintained for at least 130 h. Impressively, it also demonstrates a high turnover frequency value of 0.22 mol O2 s−1 at an overpotential of 500 mV.

Graphical abstract: An amorphous Co-carbonate-hydroxide nanowire array for efficient and durable oxygen evolution reaction in carbonate electrolytes

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Publication details

The article was received on 29 Sep 2017, accepted on 06 Oct 2017 and first published on 09 Oct 2017


Article type: Communication
DOI: 10.1039/C7NR07269D
Citation: Nanoscale, 2017,9, 16612-16615
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    An amorphous Co-carbonate-hydroxide nanowire array for efficient and durable oxygen evolution reaction in carbonate electrolytes

    M. Xie, L. Yang, Y. Ji, Z. Wang, X. Ren, Z. Liu, A. M. Asiri, X. Xiong and X. Sun, Nanoscale, 2017, 9, 16612
    DOI: 10.1039/C7NR07269D

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